Based on the rotation transformation in phase space and the technique of integration within an ordered product of operators, the coherent state representation of the multimode phase shifting operator and one of its ne...Based on the rotation transformation in phase space and the technique of integration within an ordered product of operators, the coherent state representation of the multimode phase shifting operator and one of its new applications in quantum mechanics are given. It is proved that the coherent state is a natural language for describing the phase shifting operator or multimode phase shifting operator. The multimode phase shifting operator is also a useful tool to solve the dynamic problems of the mnltimode coordinate-momentum coupled harmonic oscillators. The exact energy spectra and eigenstates of such multimode coupled harmonic oscillators can be easily obtained by using the rnultimode phase shifting operator.展开更多
Let G be a finite group with order g and S be a subring of the algebraic number field which contains the integral extension over Z generated by a g-th primitive root co of unity, and R（G） be the character ring of G....Let G be a finite group with order g and S be a subring of the algebraic number field which contains the integral extension over Z generated by a g-th primitive root co of unity, and R（G） be the character ring of G. The prime spectrum of the commutative ring S×Z R（G） iv denoted by Spec（S×Z R（G）） and set π={p｜p is a rational prime number such that p^-1 S}. We prove that when G is a regroup, a π＇-group, or a finite Abelian group, the number of the connetted components of Spec（ S×Z R （G） ） coincides with the number of the π-regular classes in G,展开更多
The development of mobile internet and internet of things brings the vigorous developing data service, which increases need of bandwidth sharply. Operators strive to develop the data service oriented LTE(long term evo...The development of mobile internet and internet of things brings the vigorous developing data service, which increases need of bandwidth sharply. Operators strive to develop the data service oriented LTE(long term evolution)technology, especially TD-LTE (time division-LTE) technology adopting the spectral asymmetric. This paper analyzed details of TD-LTE system networking, and studied the feasibility of TD-LTE and TD-SCDMA(TD-synchronous code division multiple access) system with the same spectrum. At last, the paper provided suggestions on networking of TD-LTE system.展开更多
A fatigue damage model is developed for evaluating accumulative fatigue damage of dumpers. The loading spectrums acted on dumpers are created according to measured strain data in field. The finite element analysis is ...A fatigue damage model is developed for evaluating accumulative fatigue damage of dumpers. The loading spectrums acted on dumpers are created according to measured strain data in field. The finite element analysis is carried out for assessing stress distribution and strength characteristics of dumpers. Fatigue damage indexes and service life are calculated by a modified Palmgren-Miner rule. The investigation shows that fatigue notch factor has a significant influence on the calculation of fatigue damage of dumpers.展开更多
The potential protective effect of marine green algae （Codium iyengerii） was examined in UV-C treated seedlings of Vigna radiata. The study comprises of three treatments of UV-C radiation （100-290 nm） dose for one...The potential protective effect of marine green algae （Codium iyengerii） was examined in UV-C treated seedlings of Vigna radiata. The study comprises of three treatments of UV-C radiation （100-290 nm） dose for one min in alternative days. This results in deformed morphological parameters, including： decrease in plant height, fresh mass of leaves, shoots and roots, as well as leaf areas, which may be attributed with decreased in the relative growth rate, carbohydrate, amino acids, and protein contents of plant. A drastic effect of UV-C radiation was found on the photosynthetic apparatus where increase in red pigmentations on the leaves surface indicates the presence of UV-C absorbing pigments instead of chloroplast pigments. Visible spectrum of leaves chlorophyll showed reduced concentration of visible absorbing pigments which showed the deleterious effect of these radiations on physiological processes of seedlings. These negative effects of UV-C radiation on plant growth were found to be decreased by the application of green seaweed （Codium iyengerii）, and absorption spectrums of chloroplast contents showed that UV-C radiation inducing damages were appropriately managed by enhanced concentration of seaweeds which significantly increased morphological and physiological parameters like leaf, stem, root biomass, and plant height under UV-C radiation were observed.展开更多
The dispersions of the top interface optical phonons and the side interface optical phonons in cylindrical quantum dots are solved by using the dielectric continuum model. Our calculation mainly focuses on the frequen...The dispersions of the top interface optical phonons and the side interface optical phonons in cylindrical quantum dots are solved by using the dielectric continuum model. Our calculation mainly focuses on the frequency dependence of the IO phonon modes on the wave-vector and quantum number in the cylindrical quantum dot system.Results reveal that the frequency of top interface optical phonon sensitively depends on the discrete wave-vector in z direction and the azimuthal quantum number, while that of the side interface optical phonon mode depends on the radial and azimuthal quantum numbers. These features are obviously different from those in quantum well, quantum well wire,and spherical quantum dot systems. The limited frequencies of interface optical modes for the large wave-vector or quantum number approach two certain constant values, and the math and physical reasons for this feature have been explained reasonably.展开更多
本文旨在研究油纸绝缘介质老化机理与弛豫响应特征量之间的内在关系,将RVM(Return Voltage Measurement)技术应用于油纸变压器绝缘状态的无损诊断。通过RVM实验测量平台,测得恒温条件下不同微水含量、不同内部结构和不同老化状态的油纸...本文旨在研究油纸绝缘介质老化机理与弛豫响应特征量之间的内在关系,将RVM(Return Voltage Measurement)技术应用于油纸变压器绝缘状态的无损诊断。通过RVM实验测量平台,测得恒温条件下不同微水含量、不同内部结构和不同老化状态的油纸绝缘样品对应的回复电压时域极化谱线,根据实验数据分析出不同绝缘状态下油纸绝缘时域极化谱特性参数的变化规律,并结合介质极化响应理论,阐明特征参数弛豫特性变化机理。实验结果表明:时域回复电压极化谱中回复电压最大值和主时间常数的位置改变,能有效反应油纸绝缘受潮和老化情况;初始斜率在充电时间10?2~101s、峰值时间在充电时间101~104s的量值大小,构成无损诊断的信息依据;初始斜率是老化程度的直接反馈参量,以区分水分对极化谱特性的影响;主时间常数可甄别绝缘结构不同的变压器绝缘状态,其与微水含量的指数函数关系,可用于延缓变压器受潮,提高运行可靠性。展开更多
基金Project supported by the Natural Science Foundation of Shandong Province of China (Grant No. Y2008A16)the Natural Science Foundation of Heze University of Shandong Province, China (Grant No. XY09WL01)
文摘Based on the rotation transformation in phase space and the technique of integration within an ordered product of operators, the coherent state representation of the multimode phase shifting operator and one of its new applications in quantum mechanics are given. It is proved that the coherent state is a natural language for describing the phase shifting operator or multimode phase shifting operator. The multimode phase shifting operator is also a useful tool to solve the dynamic problems of the mnltimode coordinate-momentum coupled harmonic oscillators. The exact energy spectra and eigenstates of such multimode coupled harmonic oscillators can be easily obtained by using the rnultimode phase shifting operator.
文摘Let G be a finite group with order g and S be a subring of the algebraic number field which contains the integral extension over Z generated by a g-th primitive root co of unity, and R（G） be the character ring of G. The prime spectrum of the commutative ring S×Z R（G） iv denoted by Spec（S×Z R（G）） and set π={p｜p is a rational prime number such that p^-1 S}. We prove that when G is a regroup, a π＇-group, or a finite Abelian group, the number of the connetted components of Spec（ S×Z R （G） ） coincides with the number of the π-regular classes in G,
基金Important National Science & Technology Specific Projects"New Generation Broadband Wireless Mobile Communication"2010 project"TD-LTE Large-Scale Technical Trial "( No. 2010ZX03002-009)
文摘The development of mobile internet and internet of things brings the vigorous developing data service, which increases need of bandwidth sharply. Operators strive to develop the data service oriented LTE(long term evolution)technology, especially TD-LTE (time division-LTE) technology adopting the spectral asymmetric. This paper analyzed details of TD-LTE system networking, and studied the feasibility of TD-LTE and TD-SCDMA(TD-synchronous code division multiple access) system with the same spectrum. At last, the paper provided suggestions on networking of TD-LTE system.
文摘A fatigue damage model is developed for evaluating accumulative fatigue damage of dumpers. The loading spectrums acted on dumpers are created according to measured strain data in field. The finite element analysis is carried out for assessing stress distribution and strength characteristics of dumpers. Fatigue damage indexes and service life are calculated by a modified Palmgren-Miner rule. The investigation shows that fatigue notch factor has a significant influence on the calculation of fatigue damage of dumpers.
文摘The potential protective effect of marine green algae （Codium iyengerii） was examined in UV-C treated seedlings of Vigna radiata. The study comprises of three treatments of UV-C radiation （100-290 nm） dose for one min in alternative days. This results in deformed morphological parameters, including： decrease in plant height, fresh mass of leaves, shoots and roots, as well as leaf areas, which may be attributed with decreased in the relative growth rate, carbohydrate, amino acids, and protein contents of plant. A drastic effect of UV-C radiation was found on the photosynthetic apparatus where increase in red pigmentations on the leaves surface indicates the presence of UV-C absorbing pigments instead of chloroplast pigments. Visible spectrum of leaves chlorophyll showed reduced concentration of visible absorbing pigments which showed the deleterious effect of these radiations on physiological processes of seedlings. These negative effects of UV-C radiation on plant growth were found to be decreased by the application of green seaweed （Codium iyengerii）, and absorption spectrums of chloroplast contents showed that UV-C radiation inducing damages were appropriately managed by enhanced concentration of seaweeds which significantly increased morphological and physiological parameters like leaf, stem, root biomass, and plant height under UV-C radiation were observed.
文摘The dispersions of the top interface optical phonons and the side interface optical phonons in cylindrical quantum dots are solved by using the dielectric continuum model. Our calculation mainly focuses on the frequency dependence of the IO phonon modes on the wave-vector and quantum number in the cylindrical quantum dot system.Results reveal that the frequency of top interface optical phonon sensitively depends on the discrete wave-vector in z direction and the azimuthal quantum number, while that of the side interface optical phonon mode depends on the radial and azimuthal quantum numbers. These features are obviously different from those in quantum well, quantum well wire,and spherical quantum dot systems. The limited frequencies of interface optical modes for the large wave-vector or quantum number approach two certain constant values, and the math and physical reasons for this feature have been explained reasonably.
文摘本文旨在研究油纸绝缘介质老化机理与弛豫响应特征量之间的内在关系,将RVM(Return Voltage Measurement)技术应用于油纸变压器绝缘状态的无损诊断。通过RVM实验测量平台,测得恒温条件下不同微水含量、不同内部结构和不同老化状态的油纸绝缘样品对应的回复电压时域极化谱线,根据实验数据分析出不同绝缘状态下油纸绝缘时域极化谱特性参数的变化规律,并结合介质极化响应理论,阐明特征参数弛豫特性变化机理。实验结果表明:时域回复电压极化谱中回复电压最大值和主时间常数的位置改变,能有效反应油纸绝缘受潮和老化情况;初始斜率在充电时间10?2~101s、峰值时间在充电时间101~104s的量值大小,构成无损诊断的信息依据;初始斜率是老化程度的直接反馈参量,以区分水分对极化谱特性的影响;主时间常数可甄别绝缘结构不同的变压器绝缘状态,其与微水含量的指数函数关系,可用于延缓变压器受潮,提高运行可靠性。
